What's the result of executing this code and why .

As it stands, the program you proposed is just (incorrect) pseudo code. You really need, as already suggested, to read a Java tutorial to grasp, at least, the rudimentals of such a programming language.
Below a working Java program, based on your pseudo code.

class FooTest // you need at least a class, in a Java program
{
  int a;

  public FooTest(int a){this.a = a;} // class ctor

  public void test () // this is an 'instance method' of the class
  {
    int a = 1;
    System.out.println(a);
    System.out.println(FooTest.foo()); // note you don't need an instance of the class in order to call the 'foo' static method
  }
  public static int foo () // this is a 'static method' of the class
  {
    return 2;
  }

  public static void main ( String args[]) // the main function is the required program entry point
  {
    FooTest ft = new FooTest(42); // you need an instance of the class in order to call the test method
    ft.test();
  }
}